package com.genius.aspectj;

import cn.hutool.core.util.IdUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.genius.annotation.Log;
import com.genius.core.LoginUser;
import com.genius.enums.BusinessStatus;
import com.genius.monitor.pojo.OperationLog;
import com.genius.service.AsyncLogService;
import com.genius.utils.IpUtils;
import com.genius.utils.SecurityUtils;
import com.genius.utils.ServletUtils;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collection;
import java.util.Map;

/**
 * 操作日志记录处理
 */
@Slf4j
@Aspect
@Component
public class LogAspect {

    @Autowired
    private AsyncLogService asyncLogService;

    /**
     * 处理完请求后执行
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "@annotation(controllerLog)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Log controllerLog, Object jsonResult) {
        handleLog(joinPoint, controllerLog, null, jsonResult);
    }

    /**
     * 拦截异常操作
     * @param joinPoint 切点
     * @param e 异常
     */
    @AfterThrowing(value = "@annotation(controllerLog)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Log controllerLog, Exception e) {
        handleLog(joinPoint, controllerLog, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, Log controllerLog, final Exception e, Object jsonResult) {
        // 获取当前的用户
        LoginUser loginUser = SecurityUtils.getLoginUser();
        // 创建日志对象
        OperationLog operationLog = new OperationLog();
        operationLog.setOperationId(IdUtil.getSnowflake().nextId());
        operationLog.setStatus(BusinessStatus.SUCCESS.ordinal());
        // 设置客户端信息
        setUserAgent(operationLog);
        if (loginUser != null) {
            operationLog.setOperationName(loginUser.getUser().getUsername());
        }
        if (e != null) {
            operationLog.setStatus(BusinessStatus.FAIL.ordinal());
            operationLog.setErrorMsg(StrUtil.sub(e.getMessage(),0, 2000));
        }
        // 设置方法名称
        String className = joinPoint.getTarget().getClass().getName();
        String methodName = joinPoint.getSignature().getName();
        operationLog.setMethod(className + "." + methodName + "()");
        // 设置请求方式
        operationLog.setRequestMethod(ServletUtils.getRequest().getMethod());
        // 处理设置注解上的参数
        getControllerMethodDescription(joinPoint, controllerLog, operationLog, jsonResult);
        // 保存数据库
        asyncLogService.saveOperationLog(operationLog);

    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     * @param log 日志
     * @param operationLog 操作日志
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, OperationLog operationLog, Object jsonResult) {
        // 设置action动作
        operationLog.setBusinessType(log.businessType().ordinal());
        // 设置标题
        operationLog.setTitle(log.title());
        // 设置操作人类别
        operationLog.setOperationType(log.operatorType().ordinal());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operationLog);
        }
        // 是否需要保存response，参数和值
        if (log.isSaveResponseData() && jsonResult != null) {
            operationLog.setJsonResult(StrUtil.sub(JSONUtil.toJsonStr(jsonResult),0, 2000));
        }
    }

    /**
     * 获取请求的参数，放到log中
     * @param operationLog 操作日志
     */
    private void setRequestValue(JoinPoint joinPoint, OperationLog operationLog) {
        String requestMethod = operationLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operationLog.setOperationParam(StrUtil.sub(params,0,2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operationLog.setOperationParam(StrUtil.sub(paramsMap.toString(),0, 2000));
        }
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        StringBuilder params = new StringBuilder();
        if (paramsArray != null && paramsArray.length > 0) {
            for (Object o : paramsArray) {
                if (o != null && !isFilterObject(o)) {
                    try {
                        Object jsonObj = JSONUtil.parseObj(o);
                        params.append(jsonObj).append(" ");
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        return params.toString().trim();
    }

    /**
     * 判断是否需要过滤的对象。
     * 
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    @SuppressWarnings("rawtypes")
    public boolean isFilterObject(final Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Object value : collection) {
                return value instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Object value : map.entrySet()) {
                Map.Entry entry = (Map.Entry) value;
                return entry.getValue() instanceof MultipartFile;
            }
        }
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }

    /**
     * 设置客户端信息
     * @param operationLog 操作日志信息
     */
    private void setUserAgent(OperationLog operationLog){
        HttpServletRequest request = ServletUtils.getRequest();
        // 获取客户端IP
        String ip = IpUtils.getIpAddr(ServletUtils.getRequest());
        operationLog.setOperationIp(ip);
        // 获取登陆属地
        String loginLocation = IpUtils.getRealAddressByIP(ip);
        operationLog.setOperationLocation(loginLocation);
        // 获取客户端操作系统
        operationLog.setOperationUrl(request.getRequestURI());
    }
}
